碳纤维布结合体外预应力筋加固结构的试验及数值模拟  

Experiment and Simulation of Structure Strengthened with CFRP Sheets and External Prestressed Tendons

作　　者：陆伟[1] 刘幸[1] 李彦贤 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072 [2]中国公路工程咨询集团有限公司,北京100097

出　　处：《建筑科学》2008年第3期27-31,35,共6页Building Science

基　　金：湖北省交通厅科技项目(鄂交科教[2003]570号)

摘　　要：开展了七片T形梁的碳纤维布加固、体外预应力筋加固、二者结合加固的对比试验。试验结果表明,二者相结合的结构加固能更大程度地提高结构的承载力,在其受力过程中,碳纤维布和体外预应力筋先后发挥作用,且碳纤维布利用的效率更高。借助随机有限元方法,分析了改变碳纤维布和体外预应力筋的加固参数对加固效果的影响程度,从而得出了加固效果对体外预应力筋的张拉控制应力最为敏感的结论。Experiments of seven T-shaped beams were prestressed tendons strengthening and combination of the two. done to make a comparison between CFRP sheets strengthening, external The result shows that the combination strengthening increases the carrying capacity of the structure by much more degree. During the loading process of combination strengthening, CFRP and pre-stressed tendon exert in order, while the CFRP plays a more efficient role. Using stochastic finite element method, parameters concerning the CFRP sheets and external pre stressed tendons strengthening were analyzed to decide their impact degrees. It is concluded that the enhancing effect is most sensitive to the stretching control stress.

关 键 词：碳纤维布 体外预应力筋 加固 随机有限元 

分 类 号：TU378.1[建筑科学—结构工程] TU375.02